Add Coglink to client libraries (#782)

Author: ThePedroo

README.md

@@ -117,6 +117,7 @@ Client | Platform | Compatible With | Additional Information
 [waterlink](https://github.com/lukasl-dev/waterlink) | Go | **Any**
 [gavalink](https://github.com/foxbot/gavalink) | Go | **Any** | Unmaintained
 [Lavalink-rs](https://gitlab.com/vicky5124/lavalink-rs) | Rust | **Any\*** | *`tokio`-based libraries only
+[Coglink](https://github.com/ThePedroo/Coglink) | C | Concord
 
 Or alternatively, you can create your own client library, following the [implementation documentation](https://github.com/freyacodes/Lavalink/blob/master/IMPLEMENTATION.md).
 Any client libraries marked with `Unmaintained` have been marked as such as their repositories have not received any commits for at least 1 year since time of checking,